Water tube boiler



July 11, 1933. c; LUCKE 1,917,533

WATER TUBE BOILER Filed Jan. 9, 1931 2 Sheets-Sheet 1 n4 2.1! INVENTOR .37 CzarlesEILucke HIS ATTORNEY y 11, 1933- c. E. LUCKE WATER TUBE BOILER Fil ed Jan. 9, 1951 2 Sheets-Sheet 2 -ooooo'oooooo OOOOOOOOOOG INVENTOR Cgza/rlesEiLzwlse HIS ATT RNEY Patented July 11, 1933 UNITED STATES] jGHABLES E. LUCKE, or NEW YORK, 1v. Y., ASSIGNOR To THE BABGOGK & wrLcoX coi/L PATENT oFFIcE ZEANY, or BAYONNE, N W JERSEY, A CORPORATION on NEW JERSEY WATER TUBE BOILER I Application filed January 9, 1931. Serial No. 507,574.

This invention relates to water tube boil chamber, and a bafile so arranged that gases of combustion from the combustion. cham-- her are directed across the tubes in more than one pass and then are directed t-hroughcer-- tain of the tubes.

Other objects will be apparentv to thos skilled in this particular art from the description in the specification in connection with the drawings in which- Fig. 1 is a side View of a boiler; Fig. 2 is an enlarged side View ofa structural detail of the invention; v

Fig. 3 is an end view, in "section, taken along the line 33 of Fig. 1.

In the embodiment of the invention chosen for purposes of illustration, steam andwater drum 1 is connected by means of nipples 2 to downtake headers 3. One endof a bank of tubes at is connected to thedowntake head-. ers 3, and the other end thereof is connected to uptake headers 5. In the bank of tubes 4; the outer tubes have inner tubes 35v extending therethrough and through the headers, These tubes are so arranged with-respect to each other and the headers 3 and 5 thatthe tubes 35 are open to the hot gases ofcombustion in the boiler which will sweep there through, and the heat absorbing fluid (which may be water) used in the operation of the boiler is contained'in the space between the two tubes. I

Nipples 6 connect the headers 3' with a second row of downtake headers 7' intowhich are expanded one end of each of the water tubes 8; the other ends thereof are connected to the lower part of uptake headers 5. Steam and water circulators9 connect the uptake headers 5 to the steam and water drum, completing the steam and water circulatory system. A mud drum 12, connected to the lower downtake headers 7 by nipples 11, rests upon a block 13 of the boiler setting 15 and has an outside connection which extends throughthe boiler setting. I

A baflle 20, including an upright portion 22 extending across the tube bank 4 and a lateral portion 21 resting upon the upper row of tubes of the lower bank, directs gases of combustion from the combustion chamher-:80 up and across both banks of tubes and down and across the upper bank of tubes 4 to a gas chamber 24' bounded by the upright portion 22 of the battle and the lateral portion '21 of the baffle resting on the upper row,

of the lower tube bank. From this chamber the gas enters a gas chamber 25 formed by the downtake headers 3 and nipples 6 in conjunction with one wall 26 of the boiler setting. Another gas chamber 27 is similarly formed by the wall 28 of the boiler setting 1n connection with theheaders As the headers herein shown are of the inclined type and the walls 26 and 28 are substantially vertical, both gas chambers have a substantially trapezoidal cross section which is so dimensioned that the size thereof at anyparticular point is substantially proportional to the amount of gas flowing therethroughat any time.

A superheater'25 is disposed between the bank of tubes t and 8 on the uptake side of the baflie 20. The inlet and outlet ends of this superheater extend through the upright section 22 of the battle and are expanded respectively in inlet andoutlet headers 17 and 18. These headers are located behind the battle walls and are protected from the gases of combustion in the first boiler pass by the In the operation of the boiler, the hot gases of combustion from the combustion chamber 30 will successively sweep across the bank of tubes 8, superheater 25 and the upper ends of the water tubes in the bank of tubes' l on the side thereof -ad]acent the upc tubes 85 into the gas chamber 27 leading to the stack 29.

Fig. 2 shows a simple way of connecting the tubes of the bank l into one header. The outer tube a0 is expanded in the header in the usual manner. The inner tube. 35 extends through the tube 40 and through the header and is seated in an auxiliary seat portion 36 which is fitted 1n the, outer wall,

of the header and secured by a suitable nut 37. This constructionprovides anannular chamber between the tubes 4:0 and 35 which receives water from the header. The tube '35 is open to the gas chamber 22 and .the gases ofcombustion delivered to thecombustion chamber flow therethrough.

The other end of tube 40 is expanded in the inner face of header 5 in the usual manner, and the tube 35 is expanded in' a plate 41 which is attached to-the outside face of the header 5. This manner of connecting the tubes with the header is such that steam and water may circulate in the annular the tube 35 is open tothe gas chambers 25 flow therethrough. WVhile this "manner of connecting the tubes is convenient and ef fective, and is such that they may be readily removed at any time that a replacement isnecessary, a specific-manner of connecting the tubes is not contemplated as a part of,

this invention.

From. the foregoing description it is apparent that this invention provides a multiple gas pass watertube boiler which is compact and in which the effectiveness of heat transfer is extremely high'as' anadditional heat absorbing surface exposedto hot gases of combustion is provided in the space ordinarily taken up by water tubes alone.

Furthermore, a boiler of this character is provided inwhich the water tubes may be straight and parallel and so spaced that an interdeck superheater may be readily uti-' lized. r 7

While a specific embodiment of the invention has been described in some detail,'it is understood that substitutions, changes, ad-

as defined a water tube boiler with'two tube banks spaced apart vertically between front and rear uptake and downcomer headers, the'uptake header being COIltll'lUOllS across the space, the downcomer header being interso chamber between'the tubes 35 and 40, while headers through the ditions and omissions may be made therein.

rupted and joined by nipples across the space, a bafile so constructed and arranged with respect to the tubes that it directs gases of combustion from said combustion chamber in two transverse passes, first across both upper and lower tube banks and second down across the 1 upper bank ending in the space between them,

gas tubes inside the tubes of the upper bank extending through their headers to the outside thereof, and connections to lead the gases from the end of the second transverse pass between said tube banks through the gas tubes of the upper tube bank.

2. -In a water tube boiler, two tube banks spaced apart vertically between uptake and downcomer headers, a bafile associated with both tube banks forming first an upper gas pass between itand said uptake headers and second a downward gas pass across the upper tube bank ending in a space bounded by the 7 tube banks, gas tubes inside some of the water tubes and extending through end connectors and through the outside thereof, chambers at each end of said tubes between the headers and boiler casing, and a connection from the end of the'second pass to the gas chamber bounded by said downcomer as tubes to a chamber belun'ded by said "uptake headers on the other s1 e.

3. In a Water tube boiler, a bank of compound water tubes, a'bank of water tubes spaced apart from the compound tubes and parallel thereto, located above a combustion chamber; a baflie resting upon the upper row of the lower bank'of tubes and supported thereby, including an upright and a lateral portion, a superheater disposed between the two banks of tubes, thejbanks of tubes and 'baflie being so constructed and arranged that the gases of combustion from the combustion chamber are directed successively across the lower bank of tubes,'the superheater, one end of the compound :tubes and down across the other end ofthe compound tubes to a gas chamber and thence through the compound tubes. I

4:. In a water tube boiler, a bank of inclined compound tubes, a bank of water tubes parallel to the compound tubes disposed therebelowand; above a combustion chamber, a superheater located between the two banks of tubes, a bafile including an upright and lateral portion so located with respect to the tubes that the gases of combustion from the combustion chamber are directed across the tubes in morethan one pass and then through the compound tubes. I

. CHARLES E. LUCKE. 

